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TI MCUs increase signal-processing rate

Posted: 08 Mar 2002 ?? ?Print Version ?Bookmark and Share

Keywords:texas instruments? ti? microcontroller? flash microcontroller? flash?

Texas Instruments has boosted the signal-processing capabilities of its 16-bit Flash microcontroller line, launching four new members last week that TI said will provide a sustained conversion rate of 380kSa/s from the on-chip ADC.

The MSP430F1232, F1222, F1132 and F1122 MCUs in the MSP430 family have a DTC module that provides direct data transfer between the MCU's integrated ADC and the on-chip memory.

The independent DTC enables the device's CPU to perform digital signal processing operations at up to 50 times faster than conventional MCUs without sacrificing the ultralow-power consumption, according to TI.

With the aid of the DTC, the CPU is freed to process real-time tasks simultaneously with continuous ADC sampling to achieve higher overall performance, or it can enter low-power modes to save power in battery-operated applications.

The MCUs each embed a 10-bit, 200kSa/s ADC and the DTC module. The eight-channel ADC can be configured to meet the needs of customer applications.

It features a programmable sample and hold, an oscillator, a temperature sensor, a precision reference and low-battery detection.

SoC solutions

The MSP430F1xx2 devices operate with input voltages ranging from 1.8V to 3.6V and provide complete system-on-chip solutions. Integrated features include up to 8KB of reprogrammable Flash memory, 256 bytes of RAM, a multichannel PWM timer, a watchdog timer and on-board brownout protection.

A USART in the M-SP430F12x2 devices can be used in either UART or serial peripheral interface mode. The MSP430F1122 and F-1222 each have 4KB of Flash, and the MSP430F1132 and F1232 have 8KB of Flash.

The F1232 and F1222 are in 28-pin quad flat packs while the F1132 and F1122 are in 20-pin QFPs. The power consumption in active mode is 200?A and 0.7?A in standby. The off-mode RAM retention is said to be 0.1?A.

The MSP-FET430P120 development tool, which is currently available, is a complete IDE and includes two samples of the MSP430F1232 microcontroller.

The tool supports embedded real-time JTAG emulation. Devices can be programmed either standalone or in system. In lots of 10,000 pieces the MSP430F1232 sells for $2.79. The F1222 for $2.62, the F1132 for $2.48 and the F1122 for $2.24.

John Day

EE Times





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